1999 Chevrolet Suburban 1500 Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1999 Chevrolet Suburban 1500, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 6x139.7 (6x5.5") |
|---|---|
| Lug Nut / Bolt Size | N 14x1.50 |
| Center Bore (CB) | 78.1 mm |
| Offset (ET) | 21 |
| Torque Specs | 100 ft-lbs (135 Nm) |
Imperial Match: 6x139.7 is commonly referred to as 6x5.5" in US Standard.
1999 Suburban 1500 — Year-Specific Fitment Context
The 1999 Chevrolet Suburban 1500 is in year 8 of 23 using the 6x139.7 pattern (1992–2014). Wheels from any 1992–2014 Chevrolet Suburban 1500 are cross-compatible with the 1999 model.
Chevrolet Suburban 1500 Bolt Pattern by Year
The table below shows how the Suburban 1500's wheel specifications have changed over the years. The 1999 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 1992 | 6x139.7 | 78.1 | 21 |
| 1993 | 6x139.7 | 78.1 | 21 |
| 1994 | 6x139.7 | 78.1 | 21 |
| 1995 | 6x139.7 | 78.1 | 21 |
| 1996 | 6x139.7 | 78.1 | 21 |
| 1997 | 6x139.7 | 78.1 | 21 |
| 1998 | 6x139.7 | 78.1 | 21 |
| ▸ 1999 | 6x139.7 | 78.1 | 21 |
| 2000 | 6x139.7 | 78.1 | 21 |
| 2001 | 6x139.7 | 78.1 | 21 |
| 2002 | 6x139.7 | 78.1 | 21 |
| 2003 | 6x139.7 | 78.1 | 21 |
| 2004 | 6x139.7 | 78.1 | 21 |
| 2005 | 6x139.7 | 78.1 | 21 |
| 2006 | 6x139.7 | 78.1 | 21 |
| 2007 | 6x139.7 | 78.1 | 21 |
| 2008 | 6x139.7 | 78.1 | 22 |
| 2009 | 6x139.7 | 78.1 | 22 |
| 2010 | 6x139.7 | 78.1 | 22 |
| 2011 | 6x139.7 | 78.1 | 22 |
| 2012 | 6x139.7 | 78.1 | 22 |
| 2013 | 6x139.7 | 78.1 | 22 |
| 2014 | 6x139.7 | 78.1 | 22 |
6x139.7 Pattern Context
This bolt pattern appears on 1067 vehicles in our current database and is considered common.
Examples of other vehicles using 6x139.7:
Expert Buying Guide for 1999 Chevrolet Suburban 1500
For your 1999 Chevrolet Suburban 1500, the 6x139.7 bolt pattern is shared across 1992–2014 models, ensuring broad compatibility. However, the 78.1mm center bore is critical: aftermarket wheels often have a larger bore, requiring hub-centric rings to prevent vibration and ensure proper load transfer. Offset is sensitive; the factory 21mm offset maintains suspension geometry and brake clearance. Deviating more than ±10mm may cause rubbing or handling issues. Always use lug nuts with the correct thread pitch (14x1.50) and seat type (conical/60-degree). Using incorrect lug nuts can lead to wheel loosening or stud damage. Safety first: verify all specs before installation.
Historical Fitment Data Reference
In our dataset, Chevrolet Suburban 1500 appears from 1992 to 2014 (23 model years). Across recorded model years, this model generally keeps the same bolt pattern.
- Observed bolt-pattern variants for this model: 1
- Observed center-bore variants for this model: 1
- Observed lug-size variants for this model: 1
- Observed total offset span across years: 1.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts after 50-100 miles to ensure proper seating.
- ✅ Avoid using universal fit wheels without hub-centric rings; they can cause vibration and stress on studs.
- ✅ Check brake caliper clearance when changing offset; the 1999 Suburban has limited space.
- ⚠️ Torque lugs in a star pattern to 100 ft-lbs (135 Nm), then re-check torque after 50-100 km (30-60 miles).
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1999 Chevrolet Suburban 1500 — Frequently Asked Questions
What is the bolt pattern for a 1999 Chevrolet Suburban 1500?
The 1999 Chevrolet Suburban 1500 uses a 6x139.7 bolt pattern (also called lug pattern or PCD). The center bore is 78.1mm and the offset is 21mm.
What other years of Chevrolet Suburban 1500 have the same bolt pattern as the 1999?
The Chevrolet Suburban 1500 uses the 6x139.7 pattern from 1992 through 2014. Wheels from any of these model years are dimensionally compatible with the 1999, provided the offset and center bore also match.
Can I use spacers on my 1999 Chevrolet Suburban 1500?
Yes, but ensure the wheel spacers match the 6x139.7 bolt pattern and 78.1mm center bore. Also verify that you have enough thread engagement for your N 14x1.50 hardware.
How do I measure the bolt pattern on my 1999 Chevrolet?
The 1999 Suburban 1500 uses a 6x139.7 pattern. For 4, 6, or 8-lug wheels, measure center-to-center across opposite holes. For 5-lug, measure from the center of one hole to the back of the opposite hole.
What is the PCD for a 1999 Chevrolet Suburban 1500?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1999 Suburban 1500, the PCD is 6x139.7.
What does 21mm offset mean for the 1999 Suburban 1500?
An offset of 21mm means the wheel's mounting surface is 21mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Chevrolet.
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